<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>css practice</title>
<link rel="stylesheet" href="css/float.css">
</head>
<body>
	<div id="wrap">
		<div id="d1" class="box">box1...</div>
		<div id="d2" class="box">box2...</div>
		<div id="d3" class="box">box3...</div>
		<div class="clear"></div>
	</div>
</body>
</html>